So, between the last two draws, 5910 new people joined the pool having score above 451.Out of these, 567 were 600 +, hence, 5910-567=5343 were between 451-600.
Out of 3400 ITA's issued, (3400-567)=2833 were the people above 473.
2833/19days = 149 people per day joined the pool.
If we assume normal distribution between the scores 473-(481-600) , we had around 17 people added per score per day.
If the same trend continues, and lets suppose the number of pnp's increases to 900(highly unlikely).
3400-900= 2500
17people*14days = 238 people per score
also, because of the tie-breaker rule, we still have around 187 people on 473
so the next draw cut-off will be 471-472
-900 (601-1200)
-238 (of 481-600 newly added score)
-238 (of 480 newly added score)
-238 (of 479 newly added score)
-238 (of 478 newly added score)
-238 (of 477 newly added score)
-238 (of 476 newly added score)
-238 (of 475 newly added score)
-238 (of 474 newly added score)
-238+187 (of 473 newly added score)
-238 (of 472 newly added score)
-238 (of 471 newly added score)
-238 (of 470 newly added score)
In case of lesser pnp's, which is quite expected, can be as lower as 470.
Please feel free to correct me.